It would be the best option in my opinion.Would a voltage divider into a 1:1 transformer be an option?
It would be the best option in my opinion.Would a voltage divider into a 1:1 transformer be an option?
Shouldn't Vpp equal:600VAC = 2048Vp-p. Allow headroom for surges and spikes.
http://mathforum.org/library/drmath/view/56347.htmlShouldn't Vpp equal:
Vpp = Vrms * sqrt(2) * 2
That gives me 600V * sqrt(2) * 2 = 1697 Vpp
or +/- 849V
Bump it up to 1000V for headroom. Or am I missing something?
The link states "Vrms = Vp/sqrt(2) = Vpp/sqrt(8)"
Would adding the 1:1 transformer eliminate the issue of the DAQ module input impedance introducing a parallel error into the system? It would be isolated, so there shouldn't be any current draw into it? Is that correct statement?It would be the best option in my opinion.
No event needs to be executed. Essentially this is for a power quality test. From my understanding, if the supply stays within a certain tolerance for a certain length of time, it passes. If not, it fails. Rubber stamp sort of thing for inspection purposes.At this point I need to ask what response time is required on this. I got the impression you want to monitor the voltage and kick off some event if it drops below a certain value. Does this have to be done within ms, second, a minute, an hour?
I understand in regards to the input resistance. My more worrisome concern is what would happen to the circuit if I put a 1:1 transformer in it (essentially in parallel with the 20KOhm resistor), because I don't have a good fundamental understanding of it's properties. Ideally, I think of it as getting the same voltage out of it as I put in, with the added bonus of isolation. My gut tells me it isn't that simple, and that parallel impedance errors might come into play here too, if not other things.The 1MΩ input to the DAC is not going to be much of a load across 20KΩ. In any case, don't fret this. Once it is built, just calibrate it against a good, accurate meter or oscilloscope.
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